Adapter for testing machines



Sept. 21, 1943. c. w. CLARK ADAPTER FOR TESTING MACHINES Filed Jan. 2, 1943 I INVENTOR.

BY M m ATTORNEY.

Patented Sept. 21, 1943 a Clyde wfciark, nearbom, Michal; Application January}, 1943, seria1'Noi471,15ef;

4 Claims. (011265- 12 1 'penetrator point.- A tube 'may be telescoped over the lower free end so as to be tested. 7 r r I Foran understanding of the tester, reference should be had to the accompanying drawing, in which j f Figg l is a side View showing an adapter in placein'a't'ester.

Figs. 2 and 3 are enlarged detail views; The hardness tester hereof is an instrument designed to test the hardness of materials, such as'rnetals, by penetration of a diamond point into the metal, the extent of penetration, undera predetermined load, aiior'ding a measurement of the hardness. The. testerincludes a C shaped frame I in whose upper forward end is located and sli'dably mounted a spindle 12 which ispressed down on'itsupper end bya power 1ever,3l,under load, so that a diamond point 20 connected to the lower end of the spindle either directly, as in'my prior application serial No. 384,083, filed March 19,1941, or indirectly, through an adapter IiZll whose provision isthe novel. feature hereof, can penetrate into a block of material to be tested, held against the diamond point by an elevating screw 60 which is in the lower forward end; of the frame, directlybelow the spindle,

Referring to the drawing, it will be seen that these show, the upper or forward end of the 0 shaped frame i0, aligned bores Ila and Ill) of which slidably receive a hollow spindle l2, support for which is provided by the crosspin l3 held firmly in the frame 10 and through which is threaded an adjustable supporting or bearing screw M disposed on the spindle center line and whose upper conical end l seats in acentering conical hole It of ablock ll slidably seated-i'n and guiding the spindle body. The lower end' of the hollow spindle is closed by a plug or bushing In my prior application, Serial No". 384,083, this part carries a holder H5 at Whose lower tip is a diamcnd point 21!. In this application, this part is shown asfix ed to and carrying the upper part of a cshapedadapteror g'oos'eneck [20,orby a fastening screw 12 l, and this gooseneck carries;

is a diamond point'zafa set screw 2l helping t fasten the holdeiinplacefl 'i 1 ji 1 On theforward endorthel'rrame w is mounted a; gauge.22 whose-inovablefelemen't 23 is moved upwardly yai mwam .niotion of'the,,spindle,

the operative conne'ftion betweenithe. spindle and the vhiovable'ilement -23 being established by a lever or actuating farm 24', fulcr'urnedflat 25,1an end... of the amp 2 dj p a'ssihg' through and into a cross .slotf. 2l'of .'the ,"s'pindlejto be engaged by a pressure point 28 for'rned'asfa'lower tip ofa block 29 disposed inandeclosi'ng 'a hole oflthespin'dle This hole "opens lint'o a cavityjiifl containing a coiled compression spring I which has its lower 'cndfsjeated on afshoulder ofjtne block 29 and its upper end'engag'ing aslidablewasher 32 disposed beneath a hollow'adjusting nut 33 threaded into the upper end of the spindle. Within this nut and seating on washer 32 is the shanlr 34" of a pad 35 on whose uppe face isa cross groovereceiving the lower knife edge of alink 36 whose upper knife'edge is seatedin a groove or slot in the lower face of thepower ,lever 31" which isful crumed on the frame "at 38; link '36-thus helping to center the spindle;-

. I It'will also be observed that penetrator point 20, spindle bearing point 15 -16,. gauge pressure point 2,8,the bearing point' of pad 35 on washer 32, the bearing pointof washer'32 on spring 3|, the bearingpoin't of spring 3! onjblock 29, and the bearing point of load link 33 onlpad 35, are all in one'comrnon use, .thej 'centerlineno-f the spindlel2; j e T i i f The gapib weenthe pad 35 and the upper end of the spindle is initially ,adjustableby the nut 33 and is closed'forfthe minor load setting of the tester gaugeidial, i. e., the compression of spring 3 l,,by, elevation of the elevating screw when a part to .be testedis held between that screw and the diamond pointlll,v thus determining the minor load setting of the machine for hardness testing. The relative position'of pad 35 and spindle body [2 is madevisibleby viewing the sizefof thegap between them (throughppening-39) and determinesthe relative-position ofj thespindle point 28 and the gauge. g Q

Shown here isa system for r'aisingthe power lever/and weight, and for ffreeing-itifor dropping and applying the load to the link 36 The lefthand end of the power lever 3! i'spivotedonthe frame [0 at 33, and when the power lever is pulled at its lower'enda holder l9at .WhQselOWerJ'tip down, there willbe transmittedto link 36 and spindle-12a forcetopress the diamond point .20 into the object being, tested. Inthe'testing-operatioli n eipowerv lever, with 1 its weight, is lfirst raised, and thereupon is freed so that the weight can pull the power lever down and thus cause the diamond point 20 to penetrate the object being tested. For raising the power lever 31 there is provided the system shown. That system inculdes an elevating arm 40 pivotally mounted at 4| on the frame of the machine, and having its right end 42 forked to straddle a piston rod 43 connected to a piston 44 sliding within a dashpot 45, the upper end of theprqd 43 having, a head 46 adapted to engage a roller 41, mounted on the right end of the power lever 31 near the point 48 where the weight 49 is suspended from- The left end of the elevating ta-ched to and thus movable with the spindle, and having a penetrating point on its lower end,

the power lever. arm 40 is connected by a toggle linkage ll'-5I to a cross shaft 52 journalled in the frame of the f machine, and having an exposed hand lever 53.

The operation is as follows l When the handle 53 is in the power lever raised position, the toggle linkage 5II-- 5I will hold the dash-pot piston'rod'43 and the power lever 37 elevated, and there will" be no load applied to the spindle I2. When the handle 53 is moved 'ciocfkwise, however, to the power'lever freeing po sition, the 'elevatingarm" 40wi1l rotate clockwise on pivot M to free itself from thehe'ad of the dash-potpistonrod 4?,thus to free'thepower lever 31 jsd'thatfweight #9 can pull the power lever downwardly, completely free of theelevating mechanism parts, and with its movement re- Strained solelyby' the dash-pot piston; Thus, during the timethat the penetration force is being applied to the diamond point, the power lever and spindle are completely free of the elevating arrangement and thus the penetration is notarfected), by friction existing within the various bearings and pivots of the elevating system for the power lever. f

Also, shown here is the elevating'screw 60 which passes through the lower forward end of the frame III to be manipulated by the conventional hand wheel BI. The screw passes clearthrough a bushing 62, seated in a hole of the frame.

The adapter by screws I26. Bracket I25 also carries acompensator spring I21 and an adjustment screw I28 for that spring. f j

At the conclusion of a test; both the spindle and the adapter I20 move down, as a unit, onto their supports or center points I5--I2 3, which thus center the spindle and adapter. When -a subsequent test is started, and the work is raised by the screw 60 to engage the penetrating point 20, both the spindle and the adapter-are lifted, asa unit, off their supports I5I23 and they remain off their supports during thetest.

The adapter is formed '0 shaped "or as a gop'see neck, to permit a tube to be telescopedovergits lower forward end, enabling -a'tester, equipped with the adapter, to be used without chafrlgfe for testing tube stock orpar'stoc'i, The testiii'g'of tu'b'e stock, resting on "a holder carried byjfthe screw 60,i's'shown., i I The adapter is 'in'the form of a thic'kfi'gi'd ic shaped casting and may wen be'considered as integral with the spindle which carries it. Its weight and shape, however, make the use of the adapter bearing I22-I23 and the spring I21 desirable.

I claim:

1. In a penetrating point type hardness testing apparatus, a frame, a spindle adapted to be moved down by a testing load bearing on its upper end, an adapter in the form of a gooseneck of C form having-an open forward side and positioned outside of the frame, and formed to be applicable to and removable from the frame and the spindle as a unit, without requiring dismantling of the spindle, the frame, or the adapter, the adapter having an upper end removably atmeans providing a centering bearing for the spindle with respect to the frame, said bearing being on a common line with the point of application of load on the spindle, the penetrating point, and the spindle centerline, and means providing a. centering bearing for the lower end of the adapter with respect to the body 01' frame, the adapter bearingbeing remote from the spindle centerline and common line of the load point and the penetrating point and spindle bearing point,

2. In a penetrating point type hardness testing apparatus, a frame, a spindle adapted tobe moved down by a testing load bearing on its upper end, an adapter attached to and thus movable with the s indle, and having a penetrating point on its lower end, means providing a centering bearing for the spindle with respect to the frame, 'said bearingbeing on a common line with the point of application of load on the spindle, "the penetrating point, and the spindle centerline, and meansproviding a centering bearing for the lower end of the adapter with respect to the body or frame, the adapter bearing being remote from the spindl centerline and common line of the load point and the penetrating point and spindle bearing point, the spindle and adapter being arranged to be lifted completely off their respective bearings upon the application of a lifting force to the penetrating point.

3. In a penetrating 'pointtype hardness testing apparatus, a frame, a spindle adapted tobe moved down by a testing load bearing on its upper end, an adapter attached to and thus movable with the spindle, and having a penetrating point on its lower end, means providing a centering bearing for the spindle with respect'to the frame, said bearing being on a common line with the point of application of load on the spindle, the penetrating pdintand the spindle center-line, and means providing CEI-ltBIl-Ilg bearing for the lower end of the adapter with respect to the body or frame, the adapter bearing being remote from the spin'dlecenterline and common line of the load point and the penetrating point and 15pmdlebearing point, the spindleand adapter being arranged to be lifted completely'oif their respective bearings upon the application of a lifting force to the ,"penetrating point, the adapter being in 'the form of a gooseneck of c form, with the open side forward, and with the adapter bearing being near the back or bightof the gooseneck.

4. In a penetrating point type hardness testing apparatuaa frame a spindleadapted to be moved down by a testing load bearing on its upper end, an adapter in the form of a gooseneck of '6 form having an open forward side and positioned out-, side of thefr'ame, and'formed tobe applicable to and removable fr'omthe frame and the spindle as centerline, and means providing a centering 10 hearing for the lower end of the adapter with respect to the body or frame, the adapter bearing being remote from the spindle centerline and. common line of the load point and the penetrating point and spindle bearing point, the spindle and adapter being arranged to be lifted completely ofi their respective bearings upon the application of a lifting force to the penetrating point.

CLYDE W. CI IARK. 

